The table shows the average number of hours of daylight per day for the last four months of the year

For this problem, the set of data is

Month Average hours per day

9 12.37

10 11.37

11 10.57

12 10

Determine the correlation for this data using the R^2 formula. The result is the equation

y = - 0.79x + 19.38

with

R^2 = 0.9854